JP2007253245A - Apparatus and method for milling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for milling the lower-side surface of a workpiece, which prevents the deterioration of the quality of a product and the damage of a cutting tool due to chips by surely removing the chips produced by a milling operation without weakening the force for holding the workpiece, and further to provide a method for milling. <P>SOLUTION: Two helicoidal shape chip removing grooves 41, 42 are formed on the inside wall surface 40 of an insertion bore 31. The chip removing grooves 41, 42 are formed so as to be furthermore recessed from the reference surface 43 of the inside wall surface 40, and make the inside wall surface 40 undulated in cooperation with the reference surface 43. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a milling apparatus and a processing method therefor, and more particularly, to a milling apparatus and a processing method therefor in which an effect of discharging cutting waste generated by milling is enhanced.

  2. Description of the Related Art Conventionally, when cutting such as milling is performed, it is known that chips generated by cutting are sucked and discharged from a processing portion of a workpiece by a suction machine or the like.

  For example, in Patent Document 1 below, a cutting device that installs a dust collecting cover at a cutting portion of a workpiece and sucks the cutting waste inside the dust collecting cover with a dust collector in order to suck and discharge the cutting waste after cutting. Is disclosed. In particular, Patent Document 1 discloses a technique for improving the dust collection efficiency of the dust collection cover by forming an outside air introduction groove in a contact plate provided at the tip of the dust collection cover.

  Also in Patent Document 2 below, there is a cutting device that provides a chip storage body around a cutting tool in order to discharge the cutting waste to the outside, and sucks the cutting waste inside the chip storage body with an air discharge mechanism. It is disclosed. In this patent document 2, the technique which improves the discharge property of the cutting waste inside a chip storage body by making the corner | angular part of the internal wall surface of a chip storage body into a curved surface shape is disclosed.

Japanese Patent Laid-Open No. 10-15717 Japanese Utility Model Publication No. 5-78452

  By the way, when only the lower surface is milled without penetrating the workpiece, the end mill, which is a cutting tool, is raised from the lower side of the workpiece to perform machining. At this time, the cutting waste is discharged from below the workpiece. It will be.

  However, in order to securely hold the workpiece, the lower base must be installed close to the end mill, so there is little clearance between the end mill and the lower base, and in this case, cutting chips are mainly discharged using the groove of the end mill. Will be done.

  However, in this way, when cutting waste is mainly discharged from the end mill groove, the amount of discharge from the end mill groove is not sufficient even when trying to suck and discharge by the suction machine. As a result, cutting scraps adhere to the work (product) (residue), cause damage to the work (product), and further, there is a problem that the end mill cannot be rotated to obtain an appropriate machining diameter. It was. Furthermore, the end mill side also caused a problem of causing damage.

  Therefore, the present invention is a milling apparatus and a processing method thereof for milling the lower surface of the workpiece, and without any reduction in the holding force of the workpiece, by reliably discharging the cutting waste generated by milling, An object of the present invention is to provide a milling apparatus and a processing method thereof capable of preventing deterioration of product quality due to cutting scraps and damage of a cutting tool or the like.

  The milling device according to the present invention is a milling device that performs milling on the lower surface of the workpiece with an end mill, and passes through the lower base that holds the lower surface of the workpiece below the workpiece and the end mill provided on the lower platform. And a concave and convex shaped chip removal part is provided on the inner wall surface of the insertion hole.

According to the above configuration, the cutting waste generated by the milling process is sent downward along the groove of the end mill, but the end mill that rotates by being caught by the concave and convex cutting waste falling part provided on the inner wall surface of the insertion hole and Displacement occurs between the end mill grooves and forcedly removed from the end mill groove and discharged downward.
For this reason, it is possible to efficiently use the rotation of the end mill to discharge the cutting waste, and the end mill groove is not clogged with the cutting waste, and the cutting waste can be smoothly discharged downward.

  Note that the “uneven-shaped chip removal part” may be an uneven part provided on the inner wall surface of the insertion hole, and may be a boss or rib protruding inward of the hole. It may be a dent or the like recessed outward.

  Further, a holding plate such as a die plate may be interposed between the lower base and the workpiece.

In one embodiment of the present invention, the chip removal part is a groove part formed on the inner wall surface and extending in a substantially vertical direction.
According to the said structure, cutting waste can be forcibly detached from the groove | channel of an end mill, without reducing the narrow space between an insertion hole and an end mill by making a cutting waste drop part into a groove part.
Further, since the groove portion extends substantially in the vertical direction, the cutting waste is surely caught by the groove portion corresponding to the vertical movement of the end mill, and the cutting waste can be reliably detached from the groove of the end mill.
Therefore, the cutting waste can be reliably discharged downward while ensuring the space from which the cutting waste falls off.

In one embodiment of the present invention, the groove is formed in a spiral shape.
According to the above configuration, since the groove portion is formed in a spiral shape, the groove portion is substantially perpendicular to the groove of the end mill. Therefore, in relation to the rotating end mill, the cutting waste is more easily caught in the groove portion. Become.
Therefore, it becomes easy to detach the cutting waste from the groove of the end mill, and the cutting waste can be more forcibly dropped from the groove of the end mill.

In one embodiment of the present invention, a plurality of the groove portions are formed.
According to the above configuration, since a plurality of groove portions are formed, the cutting waste is more easily caught by the groove portions, and thus the cutting waste is easily detached from the groove portion of the end mill. In particular, when the number of grooves and groove portions of the end mill is the same, any of the groove portions corresponds to the grooves of the end mill during rotation of the end mill, so that the cutting waste is more easily separated from the grooves of the end mill.
Therefore, the discharge property of the cutting waste can be further enhanced.
In addition, when the malleability of the material is low, the dischargeability of the cutting waste can be further improved by increasing the number of grooves as compared with the number of grooves in the end mill.

In one embodiment of the present invention, the cross-sectional shape of the groove is substantially triangular.
According to the said structure, when a groove part is formed in substantially triangular shape, it becomes easy to catch a part (tip part) of cutting waste on the vertical surface in a groove part.
Therefore, the cutting waste can be easily separated from the groove of the end mill, and the dischargeability of the cutting waste can be enhanced.

In one embodiment of the present invention, a suction means for sucking the cutting waste is provided, and the insertion hole is sucked from below by the suction means.
According to the above-described configuration, the cutting waste detached from the groove of the end mill is sucked from below the insertion hole by the suction means.
For this reason, since the detached cutting waste does not remain in the insertion hole, the end mill rotation is not hindered, and the workability of the milling process can be improved. In addition, the cutting waste that cannot be sufficiently removed from the end mill can be pulled down by the suction force of the suction means.
Therefore, combined with the function of the chip removal part, it is possible to further improve the discharge performance of the chip.

  The milling method of the present invention is a milling method for performing milling with an end mill on the lower surface of the workpiece, the cutting step for cutting the workpiece by bringing a rotating end mill into contact with the lower surface of the workpiece, After the cutting step, when the end mill is separated from the workpiece, the dropping step for hooking the cutting waste on the cutting waste falling portion provided on the inner wall surface of the insertion hole of the lower base and dropping the cutting waste using the rotation of the end mill. It is a method provided with.

According to the above processing method, after the cutting step, the cutting chips are forcibly cut from the groove of the end mill by hooking the cutting chips on the cutting chip dropping portion and using the rotation of the end mill to drop the cutting chips. Debris is released and discharged downward.
For this reason, it is possible to efficiently use the rotation of the end mill to discharge the cutting waste, so that the cutting scrap is not clogged in the groove of the end mill, and the cutting waste can be discharged smoothly downward.
Therefore, the cutting waste generated by milling can be reliably discharged, and product quality deterioration due to the cutting waste and damage to the cutting tool or the like can be prevented.

  In one embodiment of the present invention, the milling method includes a suction step for sucking the cutting waste from below after the dropping step.

  According to the above method, the cutting waste detached from the end mill is sucked from below the insertion hole by the suction step.

  For this reason, since the cutting waste detached from the end mill does not stay in the insertion hole, rotation of the end mill is not hindered, and the workability of milling can be improved. In addition, the cutting waste that cannot be sufficiently removed from the end mill can be pulled down by the suction force of the suction means.

  Therefore, combined with the function of the chip removal part, it is possible to further improve the discharge performance of the chip.

According to this invention, it is possible to efficiently use the rotation of the end mill to discharge the cutting waste, and the end mill groove does not become clogged with the cutting waste, and the cutting waste can be smoothly discharged downward. it can.
Therefore, it is a milling processing apparatus and a processing method for milling the lower surface of a workpiece, and the cutting waste generated by milling can be reliably discharged without reducing the holding force of the workpiece. It is possible to prevent the product quality from being deteriorated and the cutting tool from being damaged.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First, the first embodiment will be described with reference to FIGS. FIG. 1 is an overall schematic diagram of a processing line including a milling apparatus of the present embodiment, FIG. 2 is a (a) perspective view, (b) bottom view, (c) cross-sectional view of a workpiece processed by the milling apparatus. 3 is an overall front view of the milling apparatus, FIG. 4 is an explanatory view of the machining operation of the milling apparatus, FIG. 5 is a perspective view of the insertion hole provided in the lower base, and FIG. 6 is a development of the inner wall surface of the insertion hole (a). FIG. 7 (b) is a partial plan view, FIG. 7 (c) is a partial bottom view, and FIG. 7 is a cross-sectional view for explaining the operation of discharging cutting waste inside the insertion hole.

  As shown in FIG. 1, the processing line including the milling apparatus 1 of the present embodiment includes a supply process 2 for supplying a workpiece W, a leveler process 3 for smoothing the surface of the workpiece W, and milling on the surface of the workpiece W. Milling step 4 for machining, first cleaning step 5 for cleaning the surface of the workpiece W after milling, pressing step 6 for cutting and pressing the workpiece W after cleaning, and a second cleaning step for sufficiently washing the workpiece W after pressing 7 and an inspection packing process 8 for inspecting and packing the workpiece W (product) after cleaning. In addition, the strip | belt-shaped body W etc. which are shown in this lower part show the processing state of the workpiece | work W when each process passed.

  As shown in FIG. 2, the workpiece W processed in this processing line is a metal band wound in a coil shape. For example, a plate thickness of 1.2 mm, a material width of 55 mm, and a material tab pitch copper (JIS standard: C1100) Made of copper material. In the milling apparatus 1 of the present embodiment, a circular spot facing process Q (drilling cutting process to the middle of the material) is performed on the lower surface Wa of the work W.

  In this counterbore machining Q, precise machining accuracy is required. For example, the workpiece W is machined to a machining value with a hole diameter D = 19.05 ± 0.015 mm and a depth H = 0.55 ± 0.05 mm. It is required to do.

  As shown in FIG. 3, the milling apparatus 1 of the present embodiment has a pair of slide rails 11, 11 extending up and down with respect to a base 10 to be installed, and is provided below the slide rails 11, 11. A spindle 12 is installed. An end mill 13 that is driven to rotate about the vertical axis is attached to the upper part of the spindle 12 so as to perform the counterbore machining Q described above. The end mill 13 to be mounted is, for example, set to have a material of carbide (carbide), a number of blades of 2 blades, and a diameter of φ19.05 mm.

  Further, above the spindle 12, a lower base 14 slidable with respect to the slide rails 11, 11 is installed so as to be swingable via coil springs 16, 16 extending from a pedestal 15 that supports the spindle 12. Yes. A die plate 17 is provided on the upper surface of the lower base 14 so as to contact and support the lower surface Wa of the work W.

  Above the die plate 17, the above-mentioned workpiece W is installed so as to be fed horizontally from the left side to the right side of the drawing. The oil application part 18 which apply | coats is provided.

  An upper presser plate 19 that is slidable with respect to the slide rails 11, 11 is installed above the work W, and a stripper plate 20 that abuts the upper surface of the work W on the lower surface of the upper presser plate 19. Is installed.

  Further, a servo motor M is installed at the upper end of the slide rail 11 so that the upper presser plate 19 is moved up and down.

  Moreover, in this milling apparatus 1, the discharge mechanism 30 which discharges | emits the cutting waste produced by milling from the downward direction of the workpiece | work W is provided. Specifically, an insertion hole 31 extending in the vertical direction through which the end mill 13 is inserted is drilled in the lower base 14, and a waste receiving box 32 is installed below the insertion hole 31. A suction machine 34 for suctioning through the duct 33 is installed on the side of the suction machine 34 to constitute the discharge mechanism 30. As will be described later, the discharge mechanism 30 is configured to efficiently and smoothly discharge cutting waste that has become easily clogged.

  Next, the machining operation of the milling apparatus 1 will be described with reference to FIG. (A) is an opening process, (b) is a material fixing process, and (c) is a cutting process.

  First, in the opening step (a), the upper presser plate 19 is positioned upward, and the workpiece W is fed to the machining position. At this time, the work oil is fed into the upper and lower surfaces of the workpiece W in a state where the processing oil is applied by the oil application unit 18. Even in this process, the end mill 13 is rotated by the spindle 12.

  In the next material fixing step (b), the servo motor M is driven to lower the upper presser plate 19 to push down the work W, and the work W is sandwiched between the stripper plate 20 and the die plate 17. Fix it. By fixing the workpiece W, deviation of the workpiece W during milling is suppressed.

  In the next cutting step (c), the servo motor M is further driven to further lower the upper presser plate 19 and lower the lower base 14 installed via the coil spring 16. Thereby, the lower side surface Wa of the workpiece W is brought into contact with the rotating end mill 13, and the workpiece W is milled.

  Through such a series of steps, the milling apparatus 1 of the present embodiment performs the circular counterbore process Q on the lower side surface of the workpiece W as described above.

  However, in this embodiment, in order to cut the lower surface Wa of the workpiece W without penetrating the end mill 13 in this way, the cutting waste is discharged from below the workpiece W. However, since the diameter of the insertion hole 31 of the lower base 14 cannot be increased more than necessary in order to secure the work holding force of the work W, the cutting waste inevitably becomes a groove of the end mill 13 and the inner wall surface of the insertion hole 31. Using a small space S (see FIG. 3) between the end mill 13 and the lower end, there is no choice but to discharge downward.

  However, the cutting waste is not sufficiently discharged downward only by the grooves of the end mill 13 and the small space S as described above, and a state in which the cutting waste remains on the workpiece W and the end mill 13 occurs. The problem of clogging occurs.

  When the cutting waste is clogged in this way, the cutting waste adheres to the workpiece W, the workpiece W is damaged, or the cutting waste remains in the end mill 13 so that the rotation center of the end mill 13 is eccentric. Thus, there arises a problem that the quality of the workpiece W (product) side is deteriorated such that a hole shift occurs in the workpiece W or the hole diameter increases. As described above, in the present embodiment in which precise machining accuracy is required, such a problem becomes serious.

  Further, on the end mill 13 side, since the end mill 13 rotates eccentrically, the durability of the end mill 13 is deteriorated, and it is necessary to replace the end mill 13 at an early stage. This causes a problem.

  Therefore, in the present embodiment, by configuring the discharge mechanism 30 as follows, the cutting waste after the cutting process can be discharged efficiently and smoothly.

  As shown in FIG. 5, two spiral waste discharge grooves 41, 42 are formed in the inner wall surface 40 of the insertion hole 31 of the discharge mechanism 30. The waste discharge grooves 41 and 42 are formed so as to be recessed by one step from the reference surface 43 of the inner wall surface 40, and the inner wall surface 40 is formed into an uneven shape together with the reference surface 43.

  The insertion hole 31 has a substantially truncated cone shape with an upper diameter d1 as a small diameter substantially the same as the end mill 13 diameter and a lower diameter d2 as a large diameter nearly twice as large as the end mill 13 diameter. This is because it is necessary to secure the holding force of the work W on the upper surface 14a of the lower base 14 as described above, but there is no such requirement on the lower surface 14b of the lower base 14, and the cutting waste discharging effect can be enhanced. is there.

  As shown in the development view of the inner wall surface 40 in FIG. 6A, in the present embodiment, the first waste discharge groove 41 is formed so as to extend from the lower portion to the upper portion from 0 ° to 180 ° of the inner wall surface 40. The second waste discharge groove 42 is formed from 180 ° to 360 °. The cross sections of the waste discharge grooves are formed in a substantially arc shape as shown in (b) and (c), and are formed so as to gradually widen (become thicker) from the upper part to the lower part (t1 <t2).

  The inclination angle α of the waste discharge groove is set to about 45 °, and is set to be substantially orthogonal to the groove line L of the end mill 13 indicated by a virtual line.

  In addition, the number and the inclination angle α of the waste discharge grooves 41 and 42 shown in this development view are merely examples, and are not particularly limited thereto. For example, the waste discharge grooves may be one, Two or more may be formed. In addition, the inclination angle α is preferably set to α = 30 ° to 60 ° so as to intersect the groove line of the end mill 13, but may be formed vertically in the vertical direction with α = 90 °.

Next, the cutting waste discharging operation of the discharging mechanism 30 will be described with reference to FIG.
After the processing steps described above, the cutting waste X1 discharged from the workpiece W is guided downward along the groove 13a of the rotating end mill 13. And when the front-end | tip part or one part of the cutting waste X2 is caught in the above-mentioned waste discharge grooves 41 and 42 (refer the cutting waste X of FIG.6 (c)), from the groove part 13a of the end mill 13 to which the cutting waste X2 rotates. It is forcibly separated and falls below the insertion hole 31 (dropping step).
The removal of the cutting waste from the end mill 13 prevents clogging of the cutting waste such as the inside of the insertion hole 31 or the end mill 13, and the cutting waste can be discharged smoothly and efficiently.

The scrap X3 that has fallen in this way then falls into the scrap receiving box 32, is sucked into the suction machine 34 (see FIG. 2), and is forcibly discharged to the outside from the insertion hole 31 (cut scraps). X4). However, the cutting waste that has not fallen off sufficiently is also sucked into the suction machine 34, so that it is forcibly dropped from the end mill 13 and discharged to the outside (suction step).
Thus, the discharge mechanism 30 of the present embodiment can discharge the cutting waste efficiently and smoothly.

Next, the effect of this embodiment is explained in full detail.
In this embodiment, waste discharge grooves 41 and 42 are provided on the inner wall surface 40 of the insertion hole 31 through which the end mill 13 is inserted.

Thereby, although the cutting waste generated by milling is sent downward along the groove 13a of the end mill 13, it is rotated by being caught by the uneven portions of the waste discharge grooves 41 and 42 provided in the inner wall surface 40 of the insertion hole 31. Displacement occurs between the end mill 13 and the end mill 13, and it is forcibly separated from the groove 13 a of the end mill 13 and discharged downward.
For this reason, it is possible to efficiently use the rotation of the end mill 13 to discharge the cutting waste, and the groove 13a of the end mill 13 is not clogged with the cutting waste, and the cutting waste is smoothly discharged downward. Can do.

  Therefore, it is the milling processing apparatus 1 which mills the lower side surface Wa of the workpiece W, and the cutting waste generated by the milling can be reliably discharged without reducing the holding power of the workpiece W. Deterioration of product quality and damage to cutting tools can be prevented.

  In addition, in this embodiment, although it was comprised so that an uneven | corrugated | grooved part might be formed in the inner wall surface 40 by the waste discharge grooves 41 and 42, in addition to this, it is a boss | hub or rib which protrudes inward of the penetration hole 31, and cutting waste May be dropped off, or conversely, the cutting waste may be dropped off at a hollow portion recessed outward of the insertion hole 31.

Moreover, in this embodiment, the waste discharge grooves 41 and 42 are formed so as to extend substantially in the vertical direction.
As a result, in accordance with the vertical movement of the end mill 13, the cutting waste is always caught by the waste discharge grooves 41 and 42, and the cutting waste can be reliably detached from the groove 13 a of the end mill 13. In particular, since the waste discharge grooves 41 and 42 have a groove shape that is recessed outward of the insertion hole 31, the narrow space S (see FIG. 7) between the insertion hole 31 and the end mill 13 is not reduced.

  Therefore, the cutting waste can be reliably discharged downward from the end mill 13 that moves up and down while securing the space S from which the cutting waste falls off.

Moreover, in this embodiment, the waste discharge grooves 41 and 42 are formed in a spiral shape.
Thereby, since the waste discharge grooves 41 and 42 are in a positional relationship substantially orthogonal to the spiral groove 13 a of the end mill 13, more cutting waste is transferred to the waste discharge grooves 41 and 42 in relation to the rotating end mill 13. It becomes easy to get caught.
Therefore, it becomes easier to detach the cutting waste from the groove 13a of the end mill 13, and the cutting waste can be more forcibly dropped from the groove 13a of the end mill 13.

In this embodiment, a plurality of waste discharge grooves 41 and 42 are formed.
Thereby, since the cutting waste adhering to the rotating end mill 13 is more easily caught in the waste discharging grooves 41 and 42, the cutting waste is easily detached from the groove portion 13 a of the end mill 13. In particular, as in the present embodiment, when the number of the grooves 13 a and the waste discharge grooves 41 and 42 of the end mill 13 are the same, any one of the waste discharge grooves 41 and 42 becomes a groove 13 a of the end mill 13 during the rotation of the end mill 13. Therefore, the cutting waste is more easily detached from the groove of the end mill 13.
Therefore, the discharge property of the cutting waste can be further enhanced.
In addition, when the malleability of the material is low, the dischargeability of cutting waste can be further increased by increasing the number of waste discharge grooves than the number of grooves of the end mill.

Moreover, in this embodiment, the suction machine 34 which sucks the cutting waste is provided, and the insertion hole 31 is sucked from below by the suction machine 34.
As a result, the cutting waste detached from the groove 13 a of the end mill 13 is sucked from below the insertion hole 31 by the suction machine 34.
For this reason, since the separated cutting waste does not stay in the insertion hole 31, the rotation of the end mill 13 is not hindered, and the workability of the milling process can be improved. Further, cutting scraps that cannot be sufficiently removed from the end mill 13 can be pulled down by the suction force of the suction machine 34.
Therefore, combined with the chip removal effect of the chip discharge grooves 41, 42, it is possible to further increase the chip discharge efficiency.

  In the milling method of this embodiment, the rotating end mill 13 is brought into contact with the lower side surface Wa of the workpiece W to cut the workpiece W, and after the cutting step, the end mill 13 is separated from the workpiece W. In this case, a dropping step is provided in which cutting waste is caught in the waste discharge grooves 41 and 42 provided in the inner wall surface 40 of the insertion hole 31 of the lower base 14 and the cutting waste is dropped using the rotation of the end mill 13. Yes.

According to this processing method, after the cutting process, the end mill is forcibly performed by hooking the cutting chips in the chip discharge grooves 41 and 42 and using the rotation of the end mill 13 to perform the dropping process of dropping the cutting chips. The cutting waste is separated from the 13 grooves 13a and discharged downward.
For this reason, it is possible to efficiently use the rotation of the end mill 13 to discharge the cutting waste, and the groove 13a of the end mill 13 is not clogged with the cutting waste, and the cutting waste can be smoothly discharged downward. it can.
Therefore, the cutting waste generated by milling can be reliably discharged, and product quality deterioration due to the cutting waste and damage to the cutting tool or the like can be prevented.

  Moreover, in the milling method of this embodiment, the suction process which attracts | sucks cutting waste from the downward direction is provided after the drop-off process.

  According to this processing method, the cutting waste detached from the end mill 13 is sucked from below the insertion hole 31 by the suction step.

  For this reason, since the cutting waste detached from the end mill 13 does not stay in the insertion hole 31, the rotation of the end mill 13 is not hindered, and the workability of the milling process can be improved. Further, cutting scraps that cannot be sufficiently removed from the end mill 13 can be pulled down by the suction force of the suction machine 34.

  Therefore, in combination with the function of the waste discharge grooves 41 and 42, it is possible to further improve the dischargeability of the cutting waste.

  As another embodiment, for example, as shown in FIG. 8, the waste discharging groove 141 has a substantially triangular shape instead of a substantially arc shape, and particularly a facing surface 141 a that faces the rotation direction of the end mill 13 (to the left in the drawing). It is conceivable to form a wedge-shaped cross-section with a vertical cross section.

  Thus, when the waste discharge groove | channel 141 is comprised, the front-end | tip of the cutting waste X becomes easy to be hooked on the opposing surface 141a, and the effect of the waste discharge grooves 41 and 42 can be improved more.

  Therefore, the cutting waste X becomes easier to separate from the groove 13a (see FIG. 7) of the end mill 13, and the dischargeability of the cutting waste X can be enhanced.

As described above, in the correspondence between the configuration of the present invention and the above-described embodiment,
The cutting scrap removal part and the groove part of this invention correspond to the scrap discharge grooves 41, 42, 141 of the embodiment,
The suction means of the invention corresponds to the suction machine 34 of the embodiment,
The present invention is not limited to the above-described embodiments, but includes embodiments applied to all milling apparatuses and processing methods thereof.

1 is an overall schematic diagram of a processing line including a milling apparatus according to a first embodiment. (A) perspective view, (b) plan view, (c) cross-sectional view of a workpiece. The whole front view of a milling apparatus. Explanatory drawing of the processing operation of a milling apparatus. The perspective view of the insertion hole provided in the lower base. (A) Development view of inner wall surface of insertion hole, (b) Partial plan view, (c) Partial bottom view. Sectional drawing explaining discharge operation | movement of the cutting waste inside an insertion hole. Sectional drawing of the waste discharge groove | channel of other embodiment.

Explanation of symbols

W ... Work 1 ... Milling device 13 ... End mill 14 ... Lower stand 31 ... Insertion hole 34 ... Suction machine 40 ... Inner wall surface 41 ... First waste discharge groove 42 ... Second waste discharge groove 141 ... Waste discharge groove

Claims (8)

A milling machine that performs milling with an end mill on the underside of the workpiece,
A lower base for holding the lower surface of the work below the work;
An insertion hole for inserting the end mill provided in the lower base,
A milling apparatus in which a concave and convex shaped chip removal part is provided on the inner wall surface of the insertion hole. The milling apparatus according to claim 1, wherein the chip removal part is a groove formed in an inner wall surface and extending in a substantially vertical direction. The milling apparatus according to claim 2, wherein the groove is formed in a spiral shape. The milling apparatus according to claim 2 or 3, wherein a plurality of the groove portions are formed. The milling processing apparatus according to any one of claims 2 to 4, wherein a cross-sectional shape of the groove portion is a substantially triangular shape. A suction means for sucking the cutting waste is provided,
The milling apparatus according to claim 1, wherein the inside of the insertion hole is sucked from below by the suction means. A milling method for performing milling on an underside of a workpiece with an end mill,
A cutting step for cutting the workpiece by bringing a rotating end mill into contact with the lower surface of the workpiece;
After the cutting step, when the end mill is separated from the workpiece, the scrap is hooked on the chip scraping portion provided on the inner wall surface of the insertion hole of the lower base, and the scrap is dropped by using the rotation of the end mill. And a milling method comprising steps. The milling method according to claim 7, further comprising a suction step of sucking the cutting waste from below after the dropping step.

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